They may be referring to the changes to PurpleAir API [0] that introduces paid requests that you can rip through quickly when doing large scale analysis.
In the United States, AirNow.gov includes most PurpleAir sensors, although they are annotated differently than “higher quality” sensors (I was going to say than government sensors, but here in Connecticut, the state has a number of PurpleAir monitors deployed and rapidly deployed more when stuff got bad due to Canadian wildfires a few weeks ago).
Fortunately, for local users, you can hit your own sensor and grab the data however often you want. I even wrote a tool to help out and drop it into influxdb and post it to MQTT[1]. They still support local fetching of data. However, many default integrations from tools like Home Assistant could be affected as they use the cloud integration.
Wow, I hadn't seen PurpleAir's new pricing. I made https://aqi.today years ago when the API was free and now it seems like its API usage will cost over $100 per day. But they haven't even notified me about this yet. Strange.
In the United States, AirNow.gov includes most PurpleAir sensors, although they are annotated differently than “higher quality” sensors (I was going to say than government sensors, but here in Connecticut, the state has a number of PurpleAir monitors deployed and rapidly deployed more when stuff got bad due to Canadian wildfires a few weeks ago).
Fortunately, for local users, you can hit your own sensor and grab the data however often you want. I even wrote a tool to help out and drop it into influxdb and post it to MQTT[1]. They still support local fetching of data. However, many default integrations from tools like Home Assistant could be affected as they use the cloud integration.
[0] https://community.purpleair.com/t/api-pricing/4523
[1] https://github.com/pridkett/purpleair2mqtt